Operational deployments alongside a portfolio of FEED studies across different vessel types and decision contexts. One repeatable method. Each entry below is a real project, dated and coded, with the confidentiality boundary drawn where it needs to be.
A fully electrified inland crane vessel operating with zero emissions in Dordrecht seaport, January 2025.
Nexus Energy supplied a hydrogen fuel cell PowerPack that operated alongside two battery containers as the vessel's primary power source. Combined, the system delivered the full operational power the vessel needed to dredge without any power limitations, across live dredging days and nights.
The vessel is a crane-and-hopper platform originally built in 1999. After modification, two Scania diesel engines were retained on board as a backup path only. All primary energy came from batteries, hydrogen fuel cell, or shore power. A deck-mounted three-phase connection made the source interchangeable in service.
Christiaan-P · Dordrecht · Jan 2025
PowerPack & battery containers
A modular container holding an LTPEM fuel cell stack of 2 × 60 kW peak plus an integrated battery. Combined system peak of 200 kW as a range extender that continuously charged the primary battery containers on board. Operated across days and nights of live dredging without failure.
Long preparation under a Risk-Based Approach with OHSE, the battery-container experts, hydrogen storage suppliers, and shipyard integrators. HAZID performed. Hazardous-area zoning, ATEX clothing, water-screen piping, deck-level water pump, indication light for internal temperature of containers, and a night-time watchman.
Ten weeks of continuous zero-emission shore-power delivery to a supply vessel alongside a quay in Rotterdam.
The headline is not the ten weeks. It is what those ten weeks proved. LTPEM fuel cells are typically deployed for stop-start or lightly-loaded duty cycles: their datasheets tend to describe them that way. In this pilot the same technology ran at high sustained load, uninterrupted, for the full ten weeks. That is a duty profile the technology is not usually specified for, and it held.
Three sets of benefits materialised in parallel. The yard and its surrounding residents got quiet, emission-free operation on a working quay. The vessel got a silent hotel-load supply with no additional wear on its own machinery from low-load running. Nexus Energy got operational and integration evidence, at high power, at duration, that no laboratory datasheet delivers.
That evidence changes how we run FEED studies afterwards. When a supplier folder gives peak numbers, degradation curves and thermal envelopes for LTPEM at a certain duty cycle, we can hold those numbers against what a real system actually did under real conditions, and we can adjust the case accordingly. The devil is in the detail. This is where the detail comes from.
Shore power · Rotterdam · 2024
LTPEM fuel cell · hotel load
Different vessel types, different decision contexts. The shared analytical spine, not the technology, is what makes the portfolio a portfolio.
Diesel-electric baseline, roughly 86 m by 11 m, dredging duty. Question: pathway toward hydrogen-electric. Nexus Energy did the full study: measurement onboard, modelling, data engineering, data analysis, and techno-economic overview of the owner-preferred technologies. Efficiency gain identified: less installed peak power required.
Existing hybrid installation performing below expectation. Data and emission reporting inconsistent. Question: diagnose the actual performance and propose a techno-economic timeline for modifications. Nexus Energy is building a digital shadow of the energy architecture, measuring in real time.
Decision on the table: large conversion to Tier III gensets or install a hybrid system. Nexus Energy handled measurement, modelling, data engineering, data analysis, and techno-economic overview of the most suitable technologies. Independent due diligence on the sizing of the hybrid system and the case for whichever option holds.
Bring your own case.
If any of the above resembles your decision, we can talk. If it looks nothing like yours, we can still talk. The method is the same. The application is what changes.